package com.yq.design.observer;

/**
 * @ClassName Subject
 * @Description 接口，让WeatherData实现
 * @Author yaoqiang
 * @Date 2021/8/26 10:38
 * @Version 1.0
 */
public interface Subject {
    public void registerObserver(Observer o);
    public void notifyObservers();
}
